Given: 


Find: 

To find:
Given:
In a
Theorem used:
Angle bisector theorem:
If a ray bisects one angle of a triangle, then it divides the opposite side into segments whose lengths are proportional to the lengths of the two sides that form the bisected angle.
Calculation:
Consider a
Since the
Given that
Therefore triangle RMS is an isosceles triangle with
From the figure,
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